[Mesa-dev] Merging translate and unnormalized-coords-hint?

[Alex Deucher]

On Mon, Aug 16, 2010 at 10:54 AM, Luca Barbieri <luca at luca-barbieri.com> wrote:
> Regarding OpenCL, it was found that nv50 has the normalization bit in
> the sampler view, while r600 has it in the shader instruction.
>
> Thus, for nv50, the are two options:
> 1. Move the bit from the sampler state to the sampler view -> have the
> OpenCL state tracker create two sampler views, one for each
> normalization.
> 2. Leave things as is -> have the nv50 driver create two "hardware
> sampler views" (aka TIC entries) internally
>
> Right now I think nv50 just doesn't create sampler views as persistent
> GPU objects (and reemits them on sampler changes), but I'm not really
> sure about it.
>
> And for r600:
> 1. Have a normalization bit in the shader -> have the OpenCL state
> tracker recreate the shader if necessary
> 2. Don't have the normalization bit in the shader -> have the r600
> driver recompile the shader if necessary

You could also include two tex clauses in the shader and use a shader
bool to select which one you want at run time, then you wouldn't have
to recompile.

Alex

>
> If any Intel cards supports compute, that's also something to consider.
>
> Note however that all of this is independent from the resource flags.
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